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Restorative > RPD > Flashcards

RPD Flashcards

1
Q

What does RPI stand for?

A

Rest on mesial surface, proximal plate on distal surface, gingivally approaching I-bar

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2
Q

What is the mechanism of action on an RPI?

A

Rest mesially acts as axis of rotation
As the proximal plate and I-bar rotates downwards and mesially (respectively) around the axis of rotation during occlusal load
The I-bar and proximal plate disengage from the tooth/undercuts
Thus, potential traumatic torque is avoided

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3
Q

What do you need to check at the try-in stage?

A

Midline
Occlusion
Extension
Lip support
Canine Line
Incisal level
Buccal corridors
Position of teeth/colour and mould of teeth

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4
Q

What is the method of producing a new denture of the same specifications as old one?

A

Replica technique

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5
Q

What is direct retention?
How is this achieved?

A

Resistance to vertical displacement
Given by clasps

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6
Q

What is support?
How is this achieved?

A

Resistance of denture to occlusally directed loads
Given by rest seats

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7
Q

What is the aetiology of denture stomatitis?

A

Poor denture hygiene
Dentures worn at night
Immunocompromised

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8
Q

How is denture stomatitis managed?

A

Denture hygiene instruction
Tissue condition
Chlorhexidine mouthwash
Anti-fungal agents
New dentures when health is restored

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9
Q

What problem can occur with a complete upper denture occluding with a partial lower?
Why does this occur?

A

Combination syndrome, resulting in a flabby ridge
Why?
–Forces directed at anterior and upper denture displaces, results in excessive and rapid bone loss of maxillary anterior alveolar ridge. This is replaced by excess fibrous tissue

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10
Q

What is Kennedy Class 1?

A

Bilateral free end saddle

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11
Q

What is Kennedy Class 2?

A

Unilateral free end saddle

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12
Q

What is Kennedy Class 3?

A

Unilateral bounded saddle

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13
Q

What is Kennedy Class 4?

A

Anterior bounded saddles only

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14
Q

What is Craddock Class 1?

A

Tooth borne support only

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15
Q

What is Craddock Class 2?

A

Mucosa borne support only

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16
Q

What is Craddock Class 3?

A

Both tooth and mucosa borne support

17
Q

What is indirect retention?

A

Resistance to rotational displacement

18
Q

What is stability?

A

Resistance to horizontal displacement forces

19
Q

How can you improve the retention of dentures?

A

Reline
Rebase
Implant retained
Precision attachments
Remake

20
Q

Where should a post dam be?

A

Hamular notch to hamular notch
Along the vibrating line which is the junction of the hard and soft palate and is compressible tissue

21
Q

What problems can a wrong OVD give?

A

Increased OVD- decreased freeway space, difficulty speaking, teeth together at rest, difficulty eating, muscle pain
Decreased OVD- poor facial profile (collapsed face), generalised facial discomfort, lack of chewing pressure

Restorative (8 decks)

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